Document CPU clock management unit compatibles and add corresponding
clock indices. Exynos850 has two CPU clusters (CL0 and CL1), each
containing 4 Cortex-A55 cores. CPU PLLs are generating main CPU clocks
for each cluster, and there are alternate ("switch") clocks that can be
used temporarily while re-configuring the PLL for the new rate. ACLK,
ATCLK, PCLKDBG and PERIPHCLK clocks are driving corresponding buses.
CLK_CLUSTERx_SCLK are actual leaf CPU clocks and should be used to
change CPU rates. Also some CoreSight clocks can be derived from
DBG_USER (debug clock).
Signed-off-by: Sam Protsenko <[email protected]>
---
Changes in v3:
- none
Changes in v2:
- none
.../clock/samsung,exynos850-clock.yaml | 42 +++++++++++++++
include/dt-bindings/clock/exynos850.h | 54 +++++++++++++++++++
2 files changed, 96 insertions(+)
diff --git a/Documentation/devicetree/bindings/clock/samsung,exynos850-clock.yaml b/Documentation/devicetree/bindings/clock/samsung,exynos850-clock.yaml
index c752c8985a53..cdc5ded59fe5 100644
--- a/Documentation/devicetree/bindings/clock/samsung,exynos850-clock.yaml
+++ b/Documentation/devicetree/bindings/clock/samsung,exynos850-clock.yaml
@@ -36,6 +36,8 @@ properties:
- samsung,exynos850-cmu-aud
- samsung,exynos850-cmu-cmgp
- samsung,exynos850-cmu-core
+ - samsung,exynos850-cmu-cpucl0
+ - samsung,exynos850-cmu-cpucl1
- samsung,exynos850-cmu-dpu
- samsung,exynos850-cmu-g3d
- samsung,exynos850-cmu-hsi
@@ -152,6 +154,46 @@ allOf:
- const: dout_core_mmc_embd
- const: dout_core_sss
+ - if:
+ properties:
+ compatible:
+ contains:
+ const: samsung,exynos850-cmu-cpucl0
+
+ then:
+ properties:
+ clocks:
+ items:
+ - description: External reference clock (26 MHz)
+ - description: CPUCL0 switch clock (from CMU_TOP)
+ - description: CPUCL0 debug clock (from CMU_TOP)
+
+ clock-names:
+ items:
+ - const: oscclk
+ - const: dout_cpucl0_switch
+ - const: dout_cpucl0_dbg
+
+ - if:
+ properties:
+ compatible:
+ contains:
+ const: samsung,exynos850-cmu-cpucl1
+
+ then:
+ properties:
+ clocks:
+ items:
+ - description: External reference clock (26 MHz)
+ - description: CPUCL1 switch clock (from CMU_TOP)
+ - description: CPUCL1 debug clock (from CMU_TOP)
+
+ clock-names:
+ items:
+ - const: oscclk
+ - const: dout_cpucl1_switch
+ - const: dout_cpucl1_dbg
+
- if:
properties:
compatible:
diff --git a/include/dt-bindings/clock/exynos850.h b/include/dt-bindings/clock/exynos850.h
index bc15108aa3c2..7666241520f8 100644
--- a/include/dt-bindings/clock/exynos850.h
+++ b/include/dt-bindings/clock/exynos850.h
@@ -88,6 +88,18 @@
#define CLK_MOUT_G3D_SWITCH 76
#define CLK_GOUT_G3D_SWITCH 77
#define CLK_DOUT_G3D_SWITCH 78
+#define CLK_MOUT_CPUCL0_DBG 79
+#define CLK_MOUT_CPUCL0_SWITCH 80
+#define CLK_GOUT_CPUCL0_DBG 81
+#define CLK_GOUT_CPUCL0_SWITCH 82
+#define CLK_DOUT_CPUCL0_DBG 83
+#define CLK_DOUT_CPUCL0_SWITCH 84
+#define CLK_MOUT_CPUCL1_DBG 85
+#define CLK_MOUT_CPUCL1_SWITCH 86
+#define CLK_GOUT_CPUCL1_DBG 87
+#define CLK_GOUT_CPUCL1_SWITCH 88
+#define CLK_DOUT_CPUCL1_DBG 89
+#define CLK_DOUT_CPUCL1_SWITCH 90
/* CMU_APM */
#define CLK_RCO_I3C_PMIC 1
@@ -195,6 +207,48 @@
#define CLK_GOUT_CMGP_USI1_PCLK 14
#define CLK_GOUT_SYSREG_CMGP_PCLK 15
+/* CMU_CPUCL0 */
+#define CLK_FOUT_CPUCL0_PLL 1
+#define CLK_MOUT_PLL_CPUCL0 2
+#define CLK_MOUT_CPUCL0_SWITCH_USER 3
+#define CLK_MOUT_CPUCL0_DBG_USER 4
+#define CLK_MOUT_CPUCL0_PLL 5
+#define CLK_DOUT_CPUCL0_CPU 6
+#define CLK_DOUT_CPUCL0_CMUREF 7
+#define CLK_DOUT_CPUCL0_PCLK 8
+#define CLK_DOUT_CLUSTER0_ACLK 9
+#define CLK_DOUT_CLUSTER0_ATCLK 10
+#define CLK_DOUT_CLUSTER0_PCLKDBG 11
+#define CLK_DOUT_CLUSTER0_PERIPHCLK 12
+#define CLK_GOUT_CLUSTER0_ATCLK 13
+#define CLK_GOUT_CLUSTER0_PCLK 14
+#define CLK_GOUT_CLUSTER0_PERIPHCLK 15
+#define CLK_GOUT_CLUSTER0_SCLK 16
+#define CLK_GOUT_CPUCL0_CMU_CPUCL0_PCLK 17
+#define CLK_GOUT_CLUSTER0_CPU 18
+#define CLK_CLUSTER0_SCLK 19
+
+/* CMU_CPUCL1 */
+#define CLK_FOUT_CPUCL1_PLL 1
+#define CLK_MOUT_PLL_CPUCL1 2
+#define CLK_MOUT_CPUCL1_SWITCH_USER 3
+#define CLK_MOUT_CPUCL1_DBG_USER 4
+#define CLK_MOUT_CPUCL1_PLL 5
+#define CLK_DOUT_CPUCL1_CPU 6
+#define CLK_DOUT_CPUCL1_CMUREF 7
+#define CLK_DOUT_CPUCL1_PCLK 8
+#define CLK_DOUT_CLUSTER1_ACLK 9
+#define CLK_DOUT_CLUSTER1_ATCLK 10
+#define CLK_DOUT_CLUSTER1_PCLKDBG 11
+#define CLK_DOUT_CLUSTER1_PERIPHCLK 12
+#define CLK_GOUT_CLUSTER1_ATCLK 13
+#define CLK_GOUT_CLUSTER1_PCLK 14
+#define CLK_GOUT_CLUSTER1_PERIPHCLK 15
+#define CLK_GOUT_CLUSTER1_SCLK 16
+#define CLK_GOUT_CPUCL1_CMU_CPUCL1_PCLK 17
+#define CLK_GOUT_CLUSTER1_CPU 18
+#define CLK_CLUSTER1_SCLK 19
+
/* CMU_G3D */
#define CLK_FOUT_G3D_PLL 1
#define CLK_MOUT_G3D_PLL 2
--
2.39.2
On Sat, 24 Feb 2024 14:20:39 -0600, Sam Protsenko wrote:
> Document CPU clock management unit compatibles and add corresponding
> clock indices. Exynos850 has two CPU clusters (CL0 and CL1), each
> containing 4 Cortex-A55 cores. CPU PLLs are generating main CPU clocks
> for each cluster, and there are alternate ("switch") clocks that can be
> used temporarily while re-configuring the PLL for the new rate. ACLK,
> ATCLK, PCLKDBG and PERIPHCLK clocks are driving corresponding buses.
> CLK_CLUSTERx_SCLK are actual leaf CPU clocks and should be used to
> change CPU rates. Also some CoreSight clocks can be derived from
> DBG_USER (debug clock).
>
> [...]
Applied, thanks!
[01/15] dt-bindings: clock: exynos850: Add CMU_CPUCLK0 and CMU_CPUCL1
https://git.kernel.org/krzk/linux/c/76dedb9c0bb3cf3c6d639d043d7ecc98816053cc
Best regards,
--
Krzysztof Kozlowski <[email protected]>